Data Warehouse Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Teradata (490)
Business Objects (875)
Cognos (1143)
Informatica (2428)

SAS (1049)
Micro Strategy (282)
ETL (315)
OBIEE (92)

Data Warehouse Interview Questions

Questions Answers Views Company eMail

how can u convert this 25-jul-2010 from numeric to charcter?

3 7801

how to through logic of informatica using the push down optimization into oracle.

Hexaware,

2 7964

Is there any model difference between ODS and DWH

Zensar,

2 7517

How You Pull the records on daily basis into your ETL Server.

TCS,

2 7337

How IN function works in informatica? Is it similar that of oracle IN function or different? Explain

Mphasis,

2 15239

Hi I have two sources like A, B. My source A contain 10000 million records from that i need 20 attributes. My source B has also same 10000 million records from that i need only 1 attribute. By using Joiner i have to load into target? Is there any issue regarding this? if issue is there how to tune this mapping in best way?

Zensar,

2 6915

What is the grain level in DWH? If i have year to day. what is the grain level of DWH from year to day.

Zensar,

1 7273

How you count the number of records available at your source?

Zensar,

3 14554

How you load distinct records into one target and duplicate records into another target?

Mphasis,

3 16850

Converting Rows to columns I have Relational source like his. JAN FEB MAR APR 100 200 300 400 500 600 700 800 900 100 200 300 I need to convert these rows into columns to the targe. MONTH TOTAL JAN 1500 FEB 900 MAR 1200 APR 1500 Please experts help me

HP,

5 11657

write a query to get maximum salary from the employers table without duplicates....kindly help me

CTS,

5 10309

Hi experts, table 1 has 10 records, table 2 has 5 records select * from table1, table2; What is the output for this query???....plz answer

TCS,

3 7415

hi talents, how do u get sequece numbers with oracle sequence generator function in informatica.... i dont need to use sequence generator transformation..... how do u achieve this???

HP,

3 9257

What type of sorting algorithm does the Sorter Transformation use, to do its sorting Operation? 1. Bubble sort 2. Insertion sort 3. Shell sort 4. Merge sort 5. Heapsort 6. Quicksort 7. Bucket sort

Qwest,

1 5962

Hi Experts, Performance Wise Which transformation is better in LOOKUP AND JOINER TRansformations? Why? Can anybody please explain it ? Please help me out from this Question. Thanks In Advance.

CTS,

2 14129

Un-Answered Questions { Data Warehouse }

How much data hold in one universe 336 can any one explain about core dimension, balanced dimension, and dirty dimension?

1200

1)s.key generate 1 to 700 records today. tomorrow another 400 will updated how to update the records using s.key generator? 2)source is like :-- DB --> T/F stage1 --> seq1file T/f 1 is linking with T/F2 ---> seq 2 how to load the data? in source i given some conditions those r going in seq1. The another data will going to seq2 how to do this ?

2084

What is the difference between business requirement document and use case document.

1086

Hi, If anyone has base SAS certification dumps, please share.

1941

Hi, I'm planning to write COG-132 exam so looking out for dumps. If anybody is having then please e-mail me at afrinshaikh86@gmail.com. your help would be appreciated. -Regards Afrin

2176

create a job that splits the data in the Jobs.txt file into four output files. You will direct the data to the different output files using constraints. • Job name: JobLevels • Source file: Jobs.txt • Target file 1: LowLevelJobs.txt − min_lvl between 0 and 25 inclusive. − Same column types and headings as Jobs.txt. − Include column names in the first line of the output file. − Job description column should be preceded by the string “Job Title:” and embedded within square brackets. For example, if the job description is “Designer”, the derived value is: “Job Title: [Designer]”. • Target file 2: MidLevelJobs.txt − min_lvl between 26 and 100 inclusive. − Same format and derivations as Target file 1. • Target file 3: HighLevelJobs.txt − min_lvl between 101 and 500 inclusive. − Same format and derivations as Target file 1. • Rejects file: JobRejects.txt − min_lvl is out of range, i.e., below 0 or above 500. − This file has only two columns: job_id and reject_desc. − reject_desc is a variable-length text field, maximum length 100. It should contain a string of the form: “Level out of range: ”, where is the value in the min_lvl field. My Question is how do you write the stage variable for reject rows.

2817

Connecting to iserver volume using idapi classes(java classes) and after connecting to iserver I want to execute the rox on iserver and also want know the status whether that job is succesfully run or not?

1104

faq's on cognos

4114

How to add default rules in transformer?

1288

Explain scd type 3 through mapping.

1077

can anybody send me some real time screenshots of mapping in informatica powercenter. i will be vary thankful to him. my e-mail id :- prakashkumar.kumhar@gmail.com

4796

Write the unconnected lookup syntax?

1153

i'm searching on cognos..i want to know real time scenarios..persons having real time exp or undertaking trainings or who searching on cognos...can send me the details...for proper guidence..for project and interview preparation..pls help me out..my mail-id is ammu2india@gmail.com..hope u will respond as soon as possible..thanks..

2772

Write the unconnected lookup syntax and how to return more than one column.

1175

hi all i am searching for cognos jobs pls inform about the jobs to:santosh.koora@gmail.com

2438

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